It might be a terminology issue. I went back and read through the previous comments.
If an engine wont turn over, then the crankshaft will not turn. For example, the starter doesn't work, the battery is dead or the engine is seized.
In your video, the engine turns over just fine.
The engine also fires. Which is a good sign.
I think what you mean, is that the engine wont start.
So try this: Pour 1/2 shot glass worth of gasoline strait down the carb, leave the choke open, floor the throttle and crank for 5 seconds.
I'm betting that it will start and run for at least a few seconds. When it does start, let up on the throttle a bit so that you don't reline it.
If that doesn't do anything try 1 shot glass worth of fuel with the choke open and the throttle closed and crank for 5 seconds.